EP2163242A1 - Kapsel mit löslichem Blockierelement - Google Patents

Kapsel mit löslichem Blockierelement Download PDF

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Publication number
EP2163242A1
EP2163242A1 EP08164093A EP08164093A EP2163242A1 EP 2163242 A1 EP2163242 A1 EP 2163242A1 EP 08164093 A EP08164093 A EP 08164093A EP 08164093 A EP08164093 A EP 08164093A EP 2163242 A1 EP2163242 A1 EP 2163242A1
Authority
EP
European Patent Office
Prior art keywords
capsule
blocking element
composition
passage
outlet
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
EP08164093A
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English (en)
French (fr)
Inventor
designation of the inventor has not yet been filed The
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sandoz AG
Original Assignee
Sandoz AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sandoz AG filed Critical Sandoz AG
Priority to EP08164093A priority Critical patent/EP2163242A1/de
Priority to EP09782800.8A priority patent/EP2349222B1/de
Priority to PL09782800T priority patent/PL2349222T3/pl
Priority to US13/063,045 priority patent/US9629810B2/en
Priority to PCT/EP2009/061670 priority patent/WO2010029095A2/en
Priority to ES09782800.8T priority patent/ES2604590T3/es
Publication of EP2163242A1 publication Critical patent/EP2163242A1/de
Ceased legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K9/00—Medicinal preparations characterised by special physical form
    • A61K9/0087—Galenical forms not covered by A61K9/02 - A61K9/7023
    • A61K9/0095—Drinks; Beverages; Syrups; Compositions for reconstitution thereof, e.g. powders or tablets to be dispersed in a glass of water; Veterinary drenches
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K9/00—Medicinal preparations characterised by special physical form
    • A61K9/48—Preparations in capsules, e.g. of gelatin, of chocolate
    • A61K9/4808—Preparations in capsules, e.g. of gelatin, of chocolate characterised by the form of the capsule or the structure of the filling; Capsules containing small tablets; Capsules with outer layer for immediate drug release
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61J—CONTAINERS SPECIALLY ADAPTED FOR MEDICAL OR PHARMACEUTICAL PURPOSES; DEVICES OR METHODS SPECIALLY ADAPTED FOR BRINGING PHARMACEUTICAL PRODUCTS INTO PARTICULAR PHYSICAL OR ADMINISTERING FORMS; DEVICES FOR ADMINISTERING FOOD OR MEDICINES ORALLY; BABY COMFORTERS; DEVICES FOR RECEIVING SPITTLE
    • A61J3/00—Devices or methods specially adapted for bringing pharmaceutical products into particular physical or administering forms
    • A61J3/07—Devices or methods specially adapted for bringing pharmaceutical products into particular physical or administering forms into the form of capsules or similar small containers for oral use
    • A61J3/071—Devices or methods specially adapted for bringing pharmaceutical products into particular physical or administering forms into the form of capsules or similar small containers for oral use into the form of telescopically engaged two-piece capsules

Definitions

  • the present invention relates to oral application of substances, a device for the oral application of substances and a method for filling the device.
  • Oral administration or application of pharmaceutical formulations comprising an active pharmaceutical ingredient with an unpleasant taste remains a technical challenge.
  • children show a very bad compliance towards bitter formulations.
  • Taste masked formulations have been developed to improve patient compliance.
  • taste-masked formulations typically only work well for solid dosage forms. If liquid drug mixtures are used or in the case of high doses, i.e. large amounts of substance to be swallowed, taste-masked formulations typically don't work that well.
  • a delivery system for the oral application of a formulation in which a formulation chamber comprises the formulation retained by a retainer.
  • a formulation chamber comprises the formulation retained by a retainer.
  • one end of the container - the inlet - is immersed in liquid, while the other end - the outlet - is applied to the patient's mouth.
  • the patient draws the drink into a container and the device allows a fluid to flow through the container, while the agent formulation is carried away together with the drink flowing through the straw.
  • the same end - i.e. the outlet - is used.
  • the retainer moves through the container together with the flow entering into the container. Both ends of the container are crimped for preventing the release of the retainer.
  • a cap For consummation, a cap has to be removed from one end in order to enable the active agent to be drawn through the opened end. In particular in case of incorrect use, for example by tilting or shaking the container, at least a part of the active agent can be lost.
  • tubes comprising a composition to be administered as well as a shiftable block element, which is shifted when the composition is applied.
  • Other solutions provide elements, which are deformed by water (without being dissolved) for releasing an agent from a chamber.
  • Another group of solutions is based on a grid-like blocking element, which holds back the composition to be administered, until the complete composition is dissolved and can be transported through the grid.
  • systems are known comprising a blocking element which can be removed by hand before use.
  • the length of the delivery system is less than 3 cm, it is difficult for a person to move the delivery system to a glass filled with a drink and, at the same time, introducing the other end of the delivery system into the mouth. Since the delivery system is provided for exactly one application rate, packages with a number of dosages become large, and by far larger than packages of other pharmaceutical products. If a package is required to cover one month of a pharmaceutical substance, which has to be administered twice per day, the package size is not comparable with package sizes of the same product in another form. Additionally, conventional delivery systems comprise a relatively complex mechanism, related to high manufacturing costs and a high amount of waste. In particular, the amount of waste is highly increased in comparison to other common application form like tablets.
  • the underlying concept of the invention is to release a composition to be administered from a simple delivery system provided by a capsule by dissolving a dissolvable blocking element, which is located in the capsule, together with the composition.
  • an oral delivery system is based on a capsule as a container for a composition, which needs to be administered.
  • the capsule provides both, a storage space for the composition as well as a blocking/releasing element within the capsule.
  • the capsule comprises two open ends, i.e. two openings at opposed ends of the capsule.
  • the capsule comprises a section with a substantially constant cross section (apart from connection elements and other), and connects two opposed end sections, in which the inner diameter tapers.
  • conventional capsules for medical use can be used, which are opened at both ends by removing small sections of the capsule's wall at opposed ends of the capsule.
  • a conventional capsule is cut or drilled, which provides openings used as inlet and outlet, the inlet being located opposed to the outlet.
  • the capsule (like conventional capsules) is provided in two parts as an inlet part and an outlet part, which are connected with each other, for example, by engaging, after the composition (and in case other components) is filled in.
  • the connection of both parts is a step of a manufacturing method, which can be realized by conventional capsule preparation devices.
  • the manufacturing process of the inventive capsule can be provided by a number of conventional steps as well as by steps, which can be provided with minimal effort and can be realized by simple mechanisms.
  • the method comprises: providing an inlet part as well as an outlet part.
  • the opening providing the inlet and the outlet can be realized by providing the capsule parts which already comprise openings, or can be provided by opening (cutting, drilling or other removing techniques) a section of the tapered section of each capsule part. Instead of cutting, holes can be drilled.
  • At least one of the openings providing the inlet and/or the outlet has or have a diameter, which is significantly smaller than the inner diameter or the corresponding cross section of an inner section of the capsule, which connects the tapered section of the capsule.
  • shoulders are formed as protrusions towards the passage formed by the capsule at the inlet and/or outlet sections. These shoulders provide stoppers or securing elements for the blocking element and/or for a retaining element in order to prevent the blocking element and/or the retaining element from being erroneously removed from the inside of the capsule to the outside of the capsule's wall or outside the passage (or the inlet and outlet, respectively).
  • the method further comprises introducing a dissolvable element as a blocking element, filling a composition in form of particles into the capsule and closing the space, in which the composition is located by adding an insoluble filter, grid, or other retaining element to the capsule.
  • both parts are put together, for example, by engaging, snap fit or press-fit.
  • the parts can also be connected with each other by form-fit, force-fit or other types of mechanical connection.
  • the composition is held between the retaining element and the blocking element as well as by one part (or by both parts) of the capsule.
  • conventional gelatin capsules can be used and, consequently, the conventional devices for preparing the capsules can be used.
  • the capsule's wall is made of a composition comprising methylcellulose or hydroxypropyl methyl cellulose (HPMC) or both.
  • material for forming the capsule elastic material is preferred to allow press-fit of other components or between the two parts forming the capsule.
  • the capsule can be comprised of the blocking element's material, however in a form with a substantially decreased surface density for ensuring a substantially faster dissolving of the blocking element in comparison to the capsule.
  • the capsule is provided of a material having an insoluble surface layer covering the inner and/or the outer surface of the capsule.
  • any material is suitable that does not affect the human body upon contact and that does not react adversely with the composition to be stored, e.g. natural or synthetic polymers formed as continuous layers.
  • the composition to be administered comprises at least one active agent, e.g. a pharmaceutical substance.
  • the oral administration is accompanied by a liquid flow carrying the composition to be administered, or, in short form, the composition
  • the liquid can be used to dissolve a blocking element, which blocks the composition in the delivery system before use and releases the composition if liquid is drawn through a passage, for example a tube.
  • the passage of the capsule according to the invention together with the capsule, fulfils the following functions: storing the composition before use, whereby the blocking element blocks the passage before use; directing the liquid flowing through the composition and supporting the dissolvable blocking element such that the liquid can come into contact with the blocking element and dissolve the blocking element of the capsule.
  • the blocking element has the following functions: keeping the composition stored in the passage, i.e. within the capsule, before use of the capsule and allowing the release of the composition when the blocking element comes into contact with a liquid drawn through the capsule, i.e. through the interior of the capsule passage.
  • the passage provided by the capsule is made permeable to the active agent, for example by dissolving the blocking element, thereby clearing the passage.
  • the dissolvable blocking element separates the space, in which the composition is stored in the capsule's passage, from an outlet of the capsule.
  • the dissolvable blocking element is made permeable to the active agent, for example by disappearing as (partly or completely) dissolved material in the flow. This releases the composition from the capsule just in time during the delivery operation. Since delivery is linked to the operation of drawing liquid through the capsule, the release of the composition is automatically triggered by the start of the delivery operation.
  • the dissolved blocking element may as a further advantage also contribute to taste masking of the pharmaceutical composition to be delivered to a patient.
  • the material or a material component of the blocking element preferably comprises a flavor additive.
  • the blocking element forms or comprises a structure which releases flavor additive when the blocking element is brought into contact with liquid solvent, in particular upon contact with water or an aqueous solution. The flavor additive is released upon dissolving at least parts of the blocking element, by dissolving at least parts of the flavor additive, or a combination thereof.
  • the inherent properties of the oral delivery system according to the invention adequately address situations occurring in prior art systems, during which the composition is released (the tube is opened and the cap is removed) but the delivery operation is not carried out.
  • the present invention there is no necessary time gap (during which composition material could be spilled) between opening the space containing the composition and using capsules.
  • the capsules according to the invention With the capsules according to the invention, the risk to loose a part of the composition by tilting or shaking a container after the cap has been removed is minimized.
  • the concept underlying the invention is implemented by using a dissolvable blocking element in a capsule which allows (1) storage of medications, (2) manufacture at low costs, (3) application of known manufacturing processes, devices and components, which can be easily obtained, (4) substantial reduction of waste and packaging, (4) drawing liquid through the passage by using a fluid permeable (pressure balancing) blocking element and (5) releasing composition upon contact of the blocking element with liquid drawn through the passage just in time, for example by dissolving upon contact with the liquid.
  • a capsule having a passage, in which a blocking element blocks the delivery of a composition stored in the passage.
  • the capsule comprises two parts connected with each other, as well as an inlet and an outlet connected by the capsule's passage.
  • the blocking element is, in an non-dissolved condition, fluid permeable and allows to draw liquid, for example water or suitable aqueous compositions, into the passage.
  • the dissolvable blocking element which is arranged in the passage, is adapted to allow release of the composition upon contact with the liquid, since the blocking element is dissolvable in said liquid, in particular in water or suitable aqueous compositions such as juice or other drinks.
  • the blocking element can be arranged nearby the outlet of the passage, or nearby the inlet. This position enables the blocking element to become dissolved upon immersing at least a part of the oral delivery system in liquid.
  • the composition is held back from the outlet, for example by being arranged between the blocking element and a retainer in the capsule, for example an non-dissolvable fluid-permeable filter.
  • the composition may be sandwiched between the blocking element and the retainer and can be released, if the blocking element is dissolved.
  • the composition and the blocking element within the capsule are at least partly coextensive such that the composition is at least partly supported in the structure of the blocking element.
  • the blocking element forms a matrix for supporting the active agent.
  • Both aspects are based on a concept of the invention, i.e. physically holding and retaining the composition in the passage formed by the capsule's walls until the blocking element in the capsule is dissolved upon exposure to liquid.
  • the blocking element can be partly dissolved, such that the blocking element loses footing and is moved outside the capsule and through the outlet together with the liquid stream.
  • both aspects are combined such that a part of the composition is physically retained inside the structure of the blocking element, and a part of the composition is blocked in the passage by the blocking element which forms a sealing element for the passage.
  • other parts of the oral delivery system can be formed of a dissolvable material, for example a plug sealing the inlet of the capsule's passage.
  • non-dissolvable retainer can be arranged in the capsule's passage between composition and an inlet opening of the passage.
  • elements other than the dissolvable blocking element of the passage are non-dissolvable in aqueous solutions, for example the lateral walls of the passage.
  • non-dissolvable means that material and wall thickness provide structural integrity of the capsule for a duration which is substantially longer than the structural integrity of the blocking element when capsule and blocking element are immersed in water.
  • the above mentioned aspects of the invention can be implemented by the following geometrical relationships related to the arrangement of the composition in a composition section of the passage relative to the blocking element.
  • the composition section can extend from a first end of the composition section, which is proximal to the outlet of the capsule's passage, to a second end of the composition section, which is distal to the outlet of the passage.
  • the first end of the blocking element i.e. the end proximal to the capsule's outlet, lies between the composition section and the outlet or abuts the end of the composition section, which is proximal to the outlet.
  • the second end of the blocking element i.e.
  • the end distal to the capsule's outlet lies at or between the first end of the blocking element within the capsule and the second end of the composition section or an inlet of the passage.
  • the closest part or section of the blocking element is closer to the capsule's outlet than the section or part of the active agent, which is closest to the outlet.
  • all composition located in the passage is controlled by the blocking element in both cases, i.e. when the blocking element is separated from the composition or when at least a part of the composition is within at least a part of the blocking element.
  • this geometrical definition relates to both, the first and the second aspect of the arrangement of the blocking element and the composition within the capsule as defined above.
  • the capsule comprises a retainer arranged in the passage between the composition and the inlet of the passage.
  • the retainer can be provided as a grid filter, porous material or any liquid permeable plug, which allows a flow of liquid and forms a support of the active agent.
  • the retainer does not lose structural integrity if a part of the blocking element is dissolved due to immersion of the capsule in liquid.
  • Any openings in the retainer are preferably smaller than the smallest particle of the composition, i.e. the active agent. This also applies for the dissolvable blocking element and any openings of the blocking element of the capsule.
  • the blocking element and the retainer can have the same general properties and dimensions.
  • the retainer does in general not significantly dissolve during the typical use of the delivery system of the invention.
  • the retainer can also be of a dissolvable material, preferably having a structure and properties providing the same reaction on liquid like water as the blocking element.
  • the time for dissolving the retaining element in water is equal to or greater than the time for dissolving the blocking element upon immersion of contact into water.
  • the retainer does not significantly impair the flow through the capsule's passage.
  • the retainer has preferably relatively wide openings or channels or pores. Consequently, the composition is formed of particles with a relative large particle size to avoid any transport of composition through the retainer.
  • the size of the pores of the retainer and the blocking element can vary depending on the particle size of the pharmaceutical composition to be delivered.
  • the retainer can be arranged in an expanded or wider section of the passage within the capsule such that any impairments to the flow caused by the retainer are at least partly compensated by a larger cross section of the passage. Further, the same mechanisms can be used to enhance the flow through the blocking element, i.e.
  • the inlet can be provided with a cross section area equal to or greater than the cross section area of the outlet, both being smaller than the cross section area at the section between both ends at which the cross section is substantially constant.
  • the retainer and/or the dissolvable blocking element are formed of elastic material, in particular elastic in a radial direction.
  • the blocking element and/or the retainer are in contact with an inner surface of the capsule (delimiting the passage in radial direction) by a press-fit.
  • the blocking element, the retainer or both are elastic for providing the press-fit.
  • the wall forming the passage is elastic for providing a press-fit.
  • the blocking element the retainer or both are (slightly) compressed in order to be fixedly positioned in the capsule by static friction.
  • the outer surface of the blocking element, of the retainer or of both contacts the inner surface of the capsule's wall. The outer surface is urged towards the wall (or vice versa) by spring tension provided by the elastic properties of the blocking element, the retainer, the capsule's wall or any combination thereof.
  • the capsule's wall extends from the inner surface to the outer surface of the wall; the thickness defining this extension of the wall is substantially constant and preferably less than 2 mm, less than 1 mm, less than 0.75 mm, less than 0.5 mm, less than 0.25 mm or less than 0.1 mm.
  • the passage and/or a conduit forming the passage comprises support elements for supporting the blocking element and/or the retainer in the passage during storage. This can be provided by additional support elements (preferably non-dissolvable) formed by the tapered walls of the capsule at the outlet (or the inlet).
  • the elements can be integrally formed with the capsule's walls delimiting the passage.
  • the blocking element, the retainer or both can be supported in the correct position in the passage by shoulders formed by the capsule's walls in the passage by an abrupt extension of the cross section area of the inner passage of the capsule along the passage itself in form of shoulders of a part of the capsule.
  • an elevation extending into the passage can be used to define a support element.
  • complimentary forms can be used, for example a section of the conduit, which has a reduced cross section or, in other words a tapered section of the conduit.
  • Supporting elements e.g. stoppers or shoulders
  • integrally formed with the passage comprise a surface or a form complementary to a surface or a form of the blocking element and/or the retainer for at least partly engaging with the blocking element and the retainer, respectively.
  • additional support elements can be used, for example at least one rod at least partly extending from the inner capsule wall into the passage in a radial direction or a grid or a filter extending radially into the capsule's passage in order to engage or contact the blocking element and/or the retainer.
  • the inventive capsule comprises a middle section with a substantially constant cross section as well as two tapered sections at both ends. Both tapered sections comprise an opening, both openings being opposed to each other and being preferably perpendicular to a longitudinal axis of the capsule. The openings are defined by circles which lie within planes perpendicular to the longitudinal axis of the capsule.
  • the capsule is preferably formed of two parts which are connected to each other by plugging, further, the capsule can also be integrally formed in principle.
  • the capsule comprises the inlet, the outlet as well as inner surface, which is partly used to hold back a composition in redial direction.
  • the capsule further comprises a retainer located at the inlet and, a dissolvable blocking element, which is located at the outlet end of the capsule as well as a pharmaceutical composition as particles which are enclosed between a part of the inner surface of the capsule, the blocking element and the retaining element. Since the retainer and the blocking element is permeable for liquid, a passage is formed between the inlet and the outlet through the retainer, the composition and the dissolvable blocking element. Upon applying a vacuum at the outlet, a liquid located at the inlet and outside the capsule will enter the inlet, flow through the retainer as well as through the composition and will reach the blocking element.
  • the part of the capsule comprising the outlets comprises an outer diameter which equals or is slightly greater than the inner diameter of the capsule's part comprising the inlet within the middle section of the capsule, such that the inlet part can be pushed onto the outlet part providing a mechanical connection.
  • the connection is provided by a snap connection provided by a circumferential grove or elevation towards the longitudinal axis of the capsule or towards the opposite direction, such that two complimentary connection elements are formed, each of the capsule parts comprising one of these elements, which engage when the capsule parts are put together forming a locked mechanical connection.
  • the passage of the oral delivery system is formed of a capsule enclosing the composition to be delivered, the blocking element and the retainer, the capsule being formed of two parts having the shape and dimensions of known capsules used for pharmacological formulations. Therefore, large parts of the manufacturing process can be reused for producing the oral delivery system according to the invention.
  • one part of the capsule is provided as outlet part, and the second part of the capsule is an inlet part, preferably comprising a retainer in form of a filter or a grid formed of non-dissolvable material.
  • the blocking element is arranged or fitted into the capsule's passage, e.g.
  • the blocking element is preferably completely or at least partly arranged in the outlet part of the capsule.
  • the outlet of the capsule is formed at an end of a part, preferably at an outer end of the outlet part.
  • the inlet is formed at an end opposed to the outlet of the capsule.
  • the capsule preferably provides a connection section adapted for being (releasably) connected to the additional mouthpiece or extension conduit.
  • the connection between two parts forming the capsule is preferably more stable than the connection between additional mouthpiece and connection section of the capsule. In this way, the parts forming the capsule are not separated, if the capsule is pulled from the additional mouthpiece.
  • composition is preferably provided as particles with a minimum particle size, for example pellets, located between the blocking element and the retainer, i.e. the inlet of the capsule.
  • the inlet part of the capsule has a cross section larger than the inner cross section of a straw (or another extension conduit or additional mouthpiece) in order to allow to arrange or attach the outlet part and the outlet of the capsule into the straw and, at the same time, to ensure that the inlet part of the capsule can not enter the straw.
  • the outer cross section of the outlet part of the capsule differs from (is smaller than) the input part of the capsule and, at the interface between inlet part and outlet part, a shoulder is formed adapted to engage with an end of an end of a straw or an additional mouthpiece or extension conduit.
  • the straw forming the additional mouthpiece has an inner diameter or ca.
  • the capsule or the part of the capsule for introduction of the mouthpiece has an outer diameter equal to the inner diameter of the mouthpiece, in addition of a small additional outer diameter equal to about 1 %, 2 %, 3 %, 5 % or 10% of the outer diameter. This ensures an adequate (releasable) press fit between straw and capsule. At least one of the straw's or the capsule's material provides elastic properties.
  • the cross section area or the cross section form of the (inner) mouthpiece or straw can slightly differ from the cross section area or the cross section form of the (outer) capsule in order to provide a mechanically stable connection between capsule and straw.
  • the connection between straw and capsule prevents the capsule from falling out of the straw, and, at the same time, provides a liquid connection between straw and passage (or outlet) provided by the capsule.
  • a tube having a grip section with or without elevated gripping elements can be used as the straw, additional mouthpiece or extension conduit.
  • Any conventional straw could be used into which the outlet part of the capsule can be inserted.
  • the outlet part of the capsule can be inserted without force or with marginal force ( ⁇ 10 N, ⁇ 5 N, ⁇ 2 N, ⁇ 1 N, ⁇ 0.5 N or ⁇ 0.1 N), connecting the capsule to the straw by press-fit.
  • the force necessary to remove the capsule from the straw is lower than the force necessary to separate one part of the capsule from another.
  • the invention can be realized by an oral delivery system formed of a capsule adapted to be at least partly fitted into an additional mouthpiece or a straw or another extension conduit, or can be realized by a combination comprising the capsule as well as instructions for use of the capsule setting out that the capsule can be plugged onto a straw.
  • the combination comprises a straw into which the outlet part (but not the inlet part) of the capsule can be plugged in.
  • the capsule providing the passage and containing the active agent provides a surface or an attachment member for engaging this part into a connectable, dedicated extension conduit, which comprises a complementary connection element with a shape complementary to the outlet section of the capsule. In this way, the passage of the capsule containing the composition can be sealingly connected to each other and form one common (elongated) passage.
  • the inlet part if the capsule has a shape, which prohibits the insertion of the inlet part into a potential mouthpiece or into the complementary connection element.
  • the inlet part is not complementary to the complementary connection element of a connectable mouthpiece.
  • the inlet part can have an outer diameter significantly larger than the inner diameter of a connectable complementary connection element, i.e. an end of a straw, or can have a larger cross section than the inner diameter of the straw's end, i.e. complementary connection element.
  • the form of the capsule's complementary connection element can be incompatible to the inlet part, e.g. by having a projection.
  • the inlet part has a colour different to the colour of the outlet part.
  • the inlet part can be distinguished from the outlet part, enabling the use in one direction and preventing the use in the "wrong" direction, together with a straw.
  • the concept underlying the invention is further realized by a method for releasable sealing a capsule, comprising: filling a composition into a capsule, the capsule forming a passage, and occluding the passage with a dissolvable blocking element as described above.
  • the passage formed by capsule is enabled by opening two opposed ends of a capsule, e.g. by cutting, by providing a capsule or two parts of a capsule with opening at the respective ends or by opening the ends of two parts, together forming a capsule.
  • the composition can be delivered to a patient by drawing liquid into the capsule's passage, dissolving the blocking element in the capsule using the liquid transported into the passage, the dissolving step enabling the composition to be transported and applied to the patient.
  • the blocking element can be dissolved by drawing liquid into the straw and by immersing a part of the capsule into liquid before drawing liquid through the passage of the capsule.
  • the blocking element, any supporting elements, as well as any retainers in the passage are preferably permeable for gas and/or for liquid. In this way, liquid or gas can be easily transported along the passage.
  • the walls of the capsule forming the passage are continuous and impervious.
  • the blocking element as well as walls of the capsule physically delimit the composition.
  • the composition is formed of solid particles, the solid particles having a minimum particle size, to which the micro-structure size channels, pores or density of the blocking element corresponds.
  • the minimum particle size is 0.1 mm, 0.2 mm, 0.5 mm, 1 mm, 2 mm, 3 mm, 4 mm or 5 mm
  • the corresponding (maximum) pore or microstructure size of the blocking element is at least slightly smaller and is at most ca. 90 %, 80 %, 70 %, 50 %, 30 %, 20 % or 10 % of the minimum or average particle size of the active agent.
  • the blocking element is preferably formed of a fibrous web or mesh, for example a filament fabric of a dissolvable material.
  • the dissolving rate or dissolving speed depends on the structure size, preferably very small filaments are used, for example a liquefied solid which has been pressed through a thin nozzle before it is solidified, e.g. by cooling.
  • Thin filaments or webs manufactured in this way are provided in a structure with a high ratio of surface area vs. volume. Due to this high ratio and the choice of a suitable material, the blocking element can be dissolved in a short time period.
  • materials with porous structures could be used, for example porous solid, membranes, which are permeable for gas and/or liquid or even a solid continuous block with at least one passage or longitudinal channel.
  • the material forming the blocking element is such that a high dissolution rate in aqueous compositions is provided and allows pressure compensation in the course of immersing the oral delivery system into liquid or drawing liquid into the passage.
  • High dissolution rate means a dissolution rate significantly higher than the rate of the material of all other elements, e.g. significantly higher than the rate of gelatin of gelatin capsules forming the capsule.
  • dissolvable does not relate to solubility in the sense of the amount of a substance, which can be dissolved in total. Rather, “dissolvable” relates to the rate in which the blocking element (or other dissolvable elements) physically changes when brought into contact with a solvent (in general water). The physical change is a loss of structural integrity. The physical change is caused by dissolving at least a part of the dissolvable element (e.g. the blocking element) and results in a structural change such that at least a part of the composition is released.
  • dissolvable can imply that only a very small amount of the blocking element can be dissolved in a short time period, if it is given that this causes a substantial structural change resulting in the removal of the blocking element, such that the remaining blocking element is carried away from the passage by the liquid flow.
  • the “dissolvable” can imply that only a high percentage or all of the blocking element is dissolved in a short time period such that the blocking element reaches the patent's mouth as a solution.
  • dissolvable is a measure for the time needed until the blocking element (or any other dissolvable element) releases a substantial part or all of the composition.
  • non-dissolvable depends on chemical properties of the used substance and on physical properties like surface area, structure, pore size, flow resistance, adhesive force or friction force between blocking element and side walls of the passage, and other.
  • non-dissolvable throughout the claims and the description denotes the property of the respective element (e.g. the capsule and the capsule's wall) to direct fluid or fluid flow and to hold other elements for a certain duration, which is substantially larger than the duration associated the release of the composition.
  • non-dissolvable also depends on physical and chemical properties as discussed above with regard to "dissolvable”.
  • Dissolvable and non-dissolvable can relate to corresponding, similar or identical materials if their respective structure provides a short time for dissolving dissolvable elements (thereby releasing the composition) as well as a long time for dissolving non-dissolvable elements like the walls of the capsule, or other.
  • the time needed between the first contact of a dissolvable element (e.g. the blocking element) and the release of a substantial amount (or all) of the composition can be in the range of 0.1 - 100 sec, preferably, 0.5 - 10 sec or 1 sec - 3 sec.
  • the time needed between the first contact with the same solvent e.g. water
  • the same solvent e.g. water
  • the density, mesh size or pore size of the blocking element is not necessarily constant along the longitudinal axis of the passage. Rather, a longitudinal section with a dense mesh or pore size of the blocking element can be used to confine the active agent, and another section attached thereto or formed therewith can be used to mechanically stabilize the first section. Further, the mesh size, pore size or density can increase or decrease in a radial direction towards the center of the passage.
  • the particle size of the active agent i.e. the respective minimum particle size
  • the particle size of the composition is adapted to the maximum pore size, mesh size or density of the blocking element.
  • the blocking element can be formed of a combination of the structures disclosed above, for example can be formed of a fibrous web in combination with a membrane, the membrane having holes for pressure compensation.
  • the membrane can have pores, holes or small channels to enable pressure compensation and to be gas and/or liquid permeable.
  • the blocking element can be provided as a film (preferably with pores), a membrane (preferably with pores), a sieve, a grid or a plate (preferably with pores) comprising dissolvable material. Further, the blocking element can be provided as a combination thereof, e.g. formed as stack.
  • the dissolving properties of the material forming the blocking element are preferably adapted to the liquid to be drawn into the passage.
  • Any pharmaceutical acceptable liquid can be used in the context of the present invention, i.e. any liquid which can be used in pharmaceutical compositions or nutrition, in particular water, water based drinks or aqueous solutions or other pharmaceutically acceptable liquids substantially being based on water.
  • the blocking element is preferably dissolvable in a liquid like water, water based drinks or aqueous solutions or other pharmaceutically acceptable liquids substantially being based on water.
  • the liquid comprises sweeteners and/or flavouring agents.
  • the aqueous solution can also comprise other compounds such as salts or buffers, preferably compounds which are frequently used in pharmaceutical compositions, such as pharmaceutical acceptable salts.
  • the blocking element comprises a material which is pharmaceutical acceptable and which is essentially dissolvable in liquid, e.g. aqueous compositions, in particular water, juice, tea or other beverages.
  • the material in essentially dissolvable in liquid to be drawn into the capsule under the conditions applied, i.e. at ambient temperature and ambient pressure.
  • the blocking element consists essentially of a material which is pharmaceutical acceptable and which is quickly dissolvable in the liquid to be drawn in the passage under the conditions applied.
  • "essentially dissolvable" refers to the blocking element or parts thereof end refers to the destruction, i.e. substantial structural degradation of the blocking structure of the blocking element.
  • the blocking element is adapted to be at least partly dissolvable such that the blocking element reduces or loses mechanical contact to the wall defining the passage in order to be movable relative to the wall.
  • the blocking element can comprise dissolvable material as well as dissolvable material, wherein the dissolvable material at least partly dissolves upon contact with the solvent causing a significant reduction of mechanical connection between blocking element and wall and/or among areas or parts of the blocking element itself. This significant reduction of mechanical connection leads to a movement of the blocking element relative to the wall/inner surface of the capsule, in particular at the outlet of the capsule, and, finally, to the disappearance of the blocking element from the capsule and the passage.
  • the dissolvable material may comprise a water-dissolvable thermoplastic material, i.e. a material which can be melted, and formed as a melt, (preferably pharmaceutically acceptable) formed by injection moulding, in particular as thin fibers, filaments or as foam or foam films comprising pores, perforations or a combination thereof.
  • a water-dissolvable thermoplastic material i.e. a material which can be melted, and formed as a melt, (preferably pharmaceutically acceptable) formed by injection moulding, in particular as thin fibers, filaments or as foam or foam films comprising pores, perforations or a combination thereof.
  • modified starch, sugars e.g. as candy floss or cotton candy or as a permeable pressed block of sugar particles
  • caramel or blends thereof
  • the thermoplastics can be melted and spun as thin filaments or formed by mould injection as a plate or membrane with pores, through holes perforations or a combination thereof.
  • thermoplastic materials comprise thermoplastic polymers as well as other, preferably pharmaceutically acceptable, materials (e.g. sugar, starch or derivates thereof) which can be processed as described above.
  • dissolvable material forms the structure of the blocking element as mechanically stabilizing element.
  • the blocking element comprises a water dissolvable compound, preferably a water dissolvable polymer or mixtures of two or more of these compounds.
  • the blocking element may for example comprise polyethylene glycol, polylactic acid, hydrolysed gelatine, mannite or water dissolvable cellulose, such as hydroxypropylmethyl cellulose and hydroxypropyl cellulose, or a mixture of two or more thereof.
  • the blocking element may comprise: sugars, such as saccharide, lactose, fructose, polylactide, starch, modified starch, starch derivatives, cellophane or any blends thereof.
  • the blocking element consists essentially of one or more of theses compounds.
  • the blocking element may comprise further compounds which may also be non-dissolvable in the liquid to be drawn into the passage as long as the blocking element as such allows the release of the composition by structural degradation, i.e. a pharmaceutical composition comprising an active agent upon contact with liquid which is drawn into the passage, for example it may comprise diluents, sweeteners, flavouring agents, or colouring agents.
  • the passage, the capsule's wall defining the passage by the capsule's inner surface and the retainer and other non-dissolvable elements extending in the passage can be formed of any suitable materials having a structure that does not degrade until these elements are dried again after use in standard conditions (air, 1013 hPa, 20 °C, rel. humidity ⁇ 95 % or ⁇ 80 %) .
  • Such materials comprise paper, plastic such as propylenelstyrene copolymers, polyproylene, high density polyethylene, low density polyethylene and the like.
  • non-dissolvable is defined as given above.
  • the composition comprises an active substance, which includes foods, food supplements, nutrients, active pharmaceutical ingredients, vitamins, and other beneficial agents, in particular the composition to be orally delivered is a pharmaceutical composition comprising an active pharmaceutical ingredient.
  • the active pharmaceutical ingredient can include any physiologically or pharmacologically active substance that produces a localized or systemic effect in a patient.
  • active pharmaceutical ingredients includes antibiotics, antiviral agents, anepileptics, analgesics, antiinflammatory agents and bronchodilators, and may be inorganic and organic compounds, including, without limitation, drugs which act on the peripheral nerves, adrenergic receptors, cholinergic receptors, the skeletal muscles, the cardiovascular system, smooth muscles, the blood circulatory system, synoptic sites, neuroeffector junctional sites, endocrine and hormone systems, the immunological system, the reproductive system, the skeletal system, autacoid systems, the alimentary and excretory systems, the histamine system and the central nervous system.
  • drugs which act on the peripheral nerves, adrenergic receptors, cholinergic receptors, the skeletal muscles, the cardiovascular system, smooth muscles, the blood circulatory system, synoptic sites, neuroeffector junctional sites, endocrine and hormone systems, the immunological system, the reproductive system, the skeletal system, autacoid systems, the alimentary and excretory systems, the his
  • Suitable agents comprised by the substance may be selected from, for example, polysaccharides, steroids, hypnotics and sedatives, psychic energizers, tranquilizers, anticonvulsants, muscle relaxants, antiparkinson agents, analgesics, anti-inflammatories, muscle contractants, antimicrobials, antimalarials, hormonal agents including contraceptives, sympathomimetics, polypeptides and proteins capable of eliciting physiological effects, diuretics, lipid regulating agents, antiandrogenic agents, antiparasitics, neoplastics, antineoplastics, hypoglycemics, nutritional agents and supplements, growth supplements, fats, ophthalmics, antienteritis agents, electrolytes and diagnostic agents.
  • Examples of specific active pharmaceutical ingredients comprised by the pharmaceutical composition and useful in this invention include prochlorperazine edisylate, ferrous sulfate, aminocaproic acid, mecamylamine hydrochloride, procainamide hydrochloride, amphetamine sulfate, methamphetamine hydrochloride, benzphetamine hydrochloride, isoproterenol sulfate, phenmetrazine hydrochloride, bethanechol chloride, methacholine chloride, pilocarpine hydrochloride, atropine sulfate, scopolamine bromide, isopropamide iodide, tridihexethyl chloride, phenformin hydrochloride, methylphenidate hydrochloride, theophylline cholinate, cephalexin hydrochloride, diphenidol, meclizine hydrochloride, prochlorperazine maleate, phenoxybenzamine, thi
  • proteins and peptides which include, but are not limited to, insulin, colchicine, glucagon, thyroid stimulating hormone, parathyroid and pituitary hormones, calcitonin, renin, prolactin, corticotrophin, thyrotropic hormone, follicle stimulating hormone, chorionic gonadotropin, gonadotropin releasing hormone, bovine somatotropin, porcine somatropin, oxytocin, vasopressin, prolactin, somatostatin, lypressin, pancreozymin and luteinizing hormone.
  • proteins and peptides which include, but are not limited to, insulin, colchicine, glucagon, thyroid stimulating hormone, parathyroid and pituitary hormones, calcitonin, renin, prolactin, corticotrophin, thyrotropic hormone, follicle stimulating hormone, chorionic gonadotropin, gonadotropin releasing hormone, bovine somatotropin, porc
  • the composition to be delivered is preferably in the form of small pellets, preferably having a mean pellet size of between 20 ⁇ m and 1000 ⁇ m, more preferably of between 50 ⁇ m and 800 ⁇ m, in particular between 100 ⁇ m and 500 ⁇ m.
  • Such small pellets which can be described as free-flowing spherical particulates, are typically produced by the agglomeration of fine powders or granules of, for example, active pharmaceutical ingredients and excipients using appropriate processing equipment.
  • Various methods for the production of pellets of a desired size are known to the person skilled in the art, for example pellet production by layering techniques, such as solution layering, suspension layering and powder layering, by extrusion techniques or by granulation techniques.
  • the invention also relates to the following items.
  • Figure 1 shows a cross section of an embodiment of the capsule according to the invention.
  • Figure 2 shows a cross section of another embodiment of the capsule according to the invention suitable for explaining the manufacturing process.
  • Figure 1 shows cross section of the preferred embodiment of the invention comprising a passage 108 within a capsule 102 which is adapted to be partly plugged into a conduit (not shown).
  • the capsule is formed of an upper part or outlet part 102a and a lower part or inlet part 102b.
  • the upper part comprises an outlet 110 formed as an opening in the upper part of the capsule 102a.
  • the outlet 110 as well as the passage 108 is blocked by a dissolvable blocking element 120 (shown as dashed area).
  • the blocking element extends in the capsule and partly extends through the outlet and in a volume outside the capsule adjacent to the outlet 110.
  • the blocking element 110 encloses composition 130 located in the upper part 102a of the capsule.
  • the lower part of the capsule 102b comprises a retaining element 140 (or retainer).
  • the retaining element 140 obturates an inlet 150 of the capsule.
  • the retainer 140 (as well as an optional filling element 142 integrally formed therewith) are provided in the complete lower part 102b of the capsule.
  • the retaining element is provided as a porous sponge or filter.
  • the upper part 102a is engaged with the lower part 102b by means of an engaging element (not shown).
  • the lower part 102b comprises a thicker outer cross section 160 to avoid the lower part of the capsule entering the extension conduit 104.
  • the upper part 102a has an outer cross section corresponding to the inner cross section of the extension conduit 104 such that only the upper part 102a extends into the extension conduit.
  • the upper part 102a is attached to the inner wall of the respective end section of the extension conduit 104 by press-fit.
  • a snap-in connection is formed by two complementary connection elements, one of which is located at the upper part 102a and one of which is located at the lower part. Upon engagement, the parts are connected with each other by a snap connection.
  • An extension conduit (not shown) connectable to the capsule and in particular the outer wall of the conduit can comprise a gripping section as well as a mouthpiece section (opposed to the respective end section of the extension conduit 104) of the oral delivery system. Since the embodiment shown in figure 1 comprises the outlet 110 of the capsule, the outer wall of the outlet 110 and the outlet part 102a can be connected to the extension conduit comprising a mouthpiece adapted to be used by a patient.
  • the non-dissolvable elements e.g. the upper part 102a and the lower part 102b have an impermissible structure formed of gelatine, starch or modified starch or other pharmaceutically acceptable materials.
  • the same materials can be used to provide the upper part and the lower part of the capsule as are used for the blocking element, if the structure of the capsule, i.e. the side wall of the passage is impermissible and does not dissolve as rapid as the blocking element.
  • the upper and lower part of the capsule form smooth inner walls, the surface area is relatively small (in comparison to the dissolvable blocking element). This provides a time duration between the first contact with water and substantial structural degradation, which is substantially longer than the time duration of the blocking element between the first contact with water and substantial structural degradation the blocking element resulting in the release of the pharmaceutical composition (given that the contact with water is continuous).
  • the walls of the capsule i.e. the sidewalls forming the upper part 102a and the lower part 102b a drawn in continuous lines and the contour of the capsule at inlet and outlet is shown in dashed lines.
  • the upper and the lower part have continuous, impervious sidewalls forming the passage for directing the liquid flow.
  • the capsule is pervious for gas and liquid to enable a flow from the inlet to the outlet (and to the space beyond the outlet), if e.g. vacuum is applied to the outlet.
  • the capsule provides a low flow resistance at the area shown with dashed lines such that liquid and gas can be flow from the space below the inlet (e.g. a glass with a drink) to the space above the outlet (e.g. a extension conduit in form of a straw or the patient's mouth).
  • Parts shown with continuous lines e.g. the side wall
  • the capsule enables a fluidic flow through the features depicted with the dashed line (e.g. openings providing inlet and outlet), i.e. a fluidic flow from the capsule's inside to the space outside the capsule.
  • the dashed lines allow gas or liquid flow.
  • Figure 2 shows a capsule formed of two parts, an inlet part 202a and an outlet part 202b.
  • the outlet part comprises an outlet opening 210 which is obstructed by a dissolvable blocking element 220.
  • the outlet part extends between the outlet 210 and the position of the capsule, at which the tapering at the inner part begins.
  • the inlet part comprises an inlet 250 similar or comparable to the outlet 210 both being provided by a hole in the wall of the capsule part.
  • a step connection is provided by mechanical connection elements at the inlet part and the outlet part of the capsule at the capsule section, in which the inlet part and the outlet part coextend along the longitudinal axis of the capsule.
  • the embodiment of Fig. 2 further comprises a retaining element 240 at the end of the outlet part, which is opposed to the inlet.
  • manufacturing can be carried out by first preparing the outlet part followed by catching the inlet part 202b into the outlet part 202a.
  • a composition 230 to be administered is enclosed.
  • the capsule comprises a composition section 231 for accommodating the composition within walls of the capsule, i.e. the side walls of the outlet part of the capsule.
  • One end of the composition section 231 abuts to the retaining element 240 and the opposed end of the other of the composition section 231 abuts to the blocking element 220.
  • the composition is provided in particles with a minimum particle size, whereas the retainer is provided as a porous element, having pores which are smaller than the particle size of the composition.
  • the porous size of the blocking element 220 is smaller than a minimum particle size of the composition 230.
  • the dark dotted area is filled by the dissolvable blocking element 220, whereas the lighter dotted area is filled with the retaining element 240.
  • a manufacturing process for providing the capsule of figure 2 comprises the following steps: separating the upper part from the lower part, if delivered capsules are in form of closed capsules, opening the closed ends of each part by drilling (or by cutting).
  • the outlet part is stuffed with the blocking element 220 in order to close the outlet 210 for the composition.
  • the composition i.e. particles comprising the composition
  • this step as well as the step of introducing the blocking element is carried out when the outlet 210 forms the lower end, and the opposite end of the outlet part is arranged above the outlet 210.
  • the stuffing as well as the filling of the composition is carried out by transporting the respective element or component to the open end of the outlet part, which is opposed to the outlet 210.
  • the retainer 240 is introduced into (at least a part of) the outlet part of the capsule, before, in a subsequent step, the inlet part of the capsule is pushed onto a part of the outlet part thereby closing the open end of the outlet part, which is opposed to the outlet 210.
  • a part of or all steps of the manufacturing method as described above is carried out when the output part of the capsule is held upside down with reference to the orientation shown in figure 2 .
  • the manufacturing steps are carried out in the following sequence: providing both capsule parts, separating the capsule parts (if applicable); preparing the inlet and the outlet by opening the (closed) ends of both capsule in part (if applicable); instead of preparing: providing both parts comprising an inlet and an outlet (if applicable); introducing the blocking element into the outlet part and obstructing the outlet by the blocking element; introducing the composition; introducing the retaining element (sandwiching the composition between blocking element and retainer in the outlet part of the capsule); and closing the capsule by pushing the inlet part onto the outlet part, thereby engaging both parts in order to form a mechanical connection, e.g. a snap-in connection of connection elements provided by both parts of the capsule.
  • a mechanical connection e.g. a snap-in connection of connection elements provided by both parts of the capsule.
  • Providing the inlet part with an opening in order to form the inlet can be carried out in any phase of the manufacturing and preferably before the inlet part engages the outlet part.
  • the blocking element, the composition and the retaining element are introduced into the capsule (preferably into the outlet part of the capsule) and the capsule is closed by connecting both parts with each other before inlet and outlet are provided into the wall of the inlet and the outlet part.
  • drilling or cutting the inlet and the outlet into the capsule's wall is performed after the introduction of the blocking element, the composition and/or the retaining element (or retainer) into the capsule or into a part or into both parts of the capsule.

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  • Medicinal Chemistry (AREA)
  • Pharmacology & Pharmacy (AREA)
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EP08164093A 2008-09-10 2008-09-10 Kapsel mit löslichem Blockierelement Ceased EP2163242A1 (de)

Priority Applications (6)

Application Number Priority Date Filing Date Title
EP08164093A EP2163242A1 (de) 2008-09-10 2008-09-10 Kapsel mit löslichem Blockierelement
EP09782800.8A EP2349222B1 (de) 2008-09-10 2009-09-09 Kapsel mit löslichem blockierelement
PL09782800T PL2349222T3 (pl) 2008-09-10 2009-09-09 Kapsułka z rozpuszczalnym elementem blokującym
US13/063,045 US9629810B2 (en) 2008-09-10 2009-09-09 Capsule with soluble blocking element
PCT/EP2009/061670 WO2010029095A2 (en) 2008-09-10 2009-09-09 Capsule with soluble blocking element
ES09782800.8T ES2604590T3 (es) 2008-09-10 2009-09-09 Cápsula con elemento de bloqueo soluble

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP08164093A EP2163242A1 (de) 2008-09-10 2008-09-10 Kapsel mit löslichem Blockierelement

Publications (1)

Publication Number Publication Date
EP2163242A1 true EP2163242A1 (de) 2010-03-17

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Application Number Title Priority Date Filing Date
EP08164093A Ceased EP2163242A1 (de) 2008-09-10 2008-09-10 Kapsel mit löslichem Blockierelement

Country Status (1)

Country Link
EP (1) EP2163242A1 (de)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997003634A1 (en) 1995-07-21 1997-02-06 Alza Corporation Oral delivery of discrete units
WO2004000202A1 (de) * 2002-06-24 2003-12-31 Grünenthal GmbH Darreichungsform zur oralen verabreichung von wirkstoffen, vitaminen und/oder nährstoffen
WO2004000203A1 (de) * 2002-06-24 2003-12-31 Grünenthal GmbH Darreichungsform zur oralen verabreichung von wirkstoffen, vitaminen und/oder nährstoffen

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997003634A1 (en) 1995-07-21 1997-02-06 Alza Corporation Oral delivery of discrete units
WO2004000202A1 (de) * 2002-06-24 2003-12-31 Grünenthal GmbH Darreichungsform zur oralen verabreichung von wirkstoffen, vitaminen und/oder nährstoffen
WO2004000203A1 (de) * 2002-06-24 2003-12-31 Grünenthal GmbH Darreichungsform zur oralen verabreichung von wirkstoffen, vitaminen und/oder nährstoffen

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